For expelling the devil and his whisperings

Seeking refuge from him. [1]
The Adhaan [call to prayer] . [2]
Recitation of the Quran and the [authentic] words of remembrance and supplications. [3]
Seeking refuge with Allah against Satan the Outcast:

أَعُوذُ بِاللَّهِ مِنَ الشَّيْطَانِ الرَّجيمِ

I seek refuge in Allah from Satan the outcast.

'A'oothu billaahi minash-Shaytaanir-rajeem.

The Devil is also driven out by the invocations for morning and evening, those that are said before sleeping and upon waking up, those for entering and leaving the house, including those for entering and leaving the mosque, and by many other authentic invocations taught to us by the Prophet (SAW) such as the reading of 'Ayatul-Kursi, (Al-Baqarah 2:255), and the last two 'Ayat of Surat Al-Baqarah before going to sleep.
Whoever says: 'There is none worthy of worship but Allah alone, Who has no partner, His is the dominion and His is the praise, and he is Able to do all things,' one hundred times, it will be a protection for him from the Devil throughout the day.'